Waste-trap.



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(Application file-d May 15, 1902.)

(No Model.)

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xNITED STATES PATENT OFFICE.

JOI-IN 4W. MCAULIFFE, OF PROVIDENCE, RHODE ISLAND.

WASTE-TRAP.

SPECIFICATION formingvpart of Letters Patent No. 705,777, dated July 29, 1902. Application led Mayl, 1902. Serial No. 107,412. (No model.)

To @ZZ whom, it may conceive;

Be it known that I, JOHN MOAULIFEQ-a' cltizen of the United States, residing at Providence, in the county of Providence and State.

of Rhode Island, have invented a new and useful Improvementin-WasteTraps,of which the following is a specification.

This invention has reference to an improvement in sanitary traps used to maintain `a water seal between basins, sinks, and" other xtures and the drains with which they are connected to prevent sewer-gas from entering the building. t

The object of this invention is to construct a true antisiphon sanitary trap in which the currents of the fluid flowing through the' trap eect a scouring of the interior of the trap, which trap may be conveniently opened and cleaned.

To this end the invention consists inthe peculiar and novel construction of the trap more fully set forth hereinafter,

Figure l is a transverse vertical sectional View through the center of my improved trap, u showing the direction of the fluid in its pas` sage through the trap, (indicated by arrows.) Fig. 2 is a horizontal sectional View of the trap, showing the flaring connection of the inlet-duct with the main body of the trap.

In the drawings, a indicates the preferably cylindrical main body of thetrap, a the internally-screw-threaded socket of the main body, and a2 the outiiow-duct secured in the bottom of the main body a and provided -with the. expanded inlet-opening CL3. The inletduct b connects by the curved lower part h and the branch b2 with the main body d. The branch b2 expands laterally and connects with the main body u on practically tangential lines, so asto exert athorough scrubbing action on the bottom and an upward whirling action of the water on theinner sides of the main body.

Into the socket a the dome-shaped cap cis secured, preferably by screw-thread engagement, as is shownin Fig. 1. The annular shelf c extendsin'ward from the shell of the cap c. The opening c2 is of sufiicient size to permit the flaring of the outflowduct d2 to pass through the same.

The inlet-duct b may be connected with the basin and the outfiow-duct with the wastepipe in anysuitable and usual manner. When radially under and then over the edge of the expanded inlet a3 of the outlet-duct a2, as is clearly indicated by the arrows in Fig. l. By this action of the Waste water on the inner surface of the trap the same is being constantly scoured and maintained practically clean. The trap may be readily opened by removing the dome-shaped cap c, when every part is exposed and may be con veniently and thoroughly cleaned. These advantages of my improved trap are secured, while by the construction the seal and the l antisiphon qualities of the trap are materially improved, by the use of the air-chamber c3 in the dome of the cap c.

Theair in the water passing through the chamber separates from the water as it passes over the edge of the expanded outflow-duct and collects in the dome c3. When the flow of the water stops, the air in the air-chamber cB acts on the annular surface of the water as a cushion and materially assists in maintaining the water seal in the trap. As the head diminishes in the inlet the flow of the water through the trap is retarded by the annular shelf c', so that as soon as air passes into the trap the ow will be stopped, and owing to the large quantity of water held by the body of the trap in proportion to the area of the outlet-duct c2 the water cannot be lifted, but will drop back,effectually sealing the inlet and preventing the siphoning of the trap.

Having thus described my invention, I claim as new and desire to secure by Letters Patentm 1. In a waste-trap,the combination with the main body of the trap, a detachable domeshaped upper body and an annular shelf in the detachable upper body, of a waste-duct extending from the bottom of the main body ICO through the space nclosed by the annular shelf in the detachable upper body and having` the expanded inlet-opening, as described.

2. In a Waste-trap, the combination with the main body, a contracted opening in the upper part of the main body, an outflow-duct extending through the bottom of the main body and through the contracted opening in the upper part of the main body and the expanded inlet-opening of the discharge-duct, of an inletduct connected With the lower main bod)7 by a flaring branch, as described.

3. In a Waste-trap,the combination with the inlet-duct ZJ, acylndrical main body, the flaring branch b2 connecting the inlet-duct Z7 With the main body and the contracted opening c2 in the main body of the outflow-duct a? Vand the flaring inlet-opening a3, as described.

name to this specification in the presence of 3o two subscribing Witnesses.

JOHN W. MCAULIFFE.'

Witnesses:

J. A. MILLER, Jr., ADA E. HAGERTY. 

